Fix fps output with -identify when frame rate extension is used for MPEG-2

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30683 b3059339-0415-0410-9bf9-f77b7e298cf2

Author: reimar

libmpdemux/video.c

@@ -318,7 +318,7 @@ switch(video_codec){
 
    // display info:
    sh_video->format=picture.mpeg1?0x10000001:0x10000002; // mpeg video
-   sh_video->fps=picture.fps;
+   sh_video->fps=picture.fps * picture.frame_rate_extension_n / picture.frame_rate_extension_d;
    if(!sh_video->fps){
      sh_video->frametime=0;
    } else {